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CVE-2021-27442

21
FAUCET Score

CVE-2021-27442 is a cross-site scripting (XSS) vulnerability affecting the Weintek cMT product line, allowing an unauthenticated remote attacker to inject malicious JavaScript code. With a CVSS score of 6.1 (Medium), this vulnerability requires user interaction but can lead to limited impact on confidentiality and integrity. While there is no known active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB), it has received some community discussion and media coverage, indicating awareness within the security community.

Impacted Technologies

VendorProductVersion(s)CPE
< 20210305CPE matchmatch criteria
cpe:2.3:o:weintek:cmt-svr-100_firmware:*:*:*:*:*:*:*:*
< 20210305CPE matchmatch criteria
cpe:2.3:o:weintek:cmt-svr-102_firmware:*:*:*:*:*:*:*:*
< 20210305CPE matchmatch criteria
cpe:2.3:o:weintek:cmt-svr-200_firmware:*:*:*:*:*:*:*:*
< 20210305CPE matchmatch criteria
cpe:2.3:o:weintek:cmt-svr-202_firmware:*:*:*:*:*:*:*:*
< 20210209CPE matchmatch criteria
cpe:2.3:o:weintek:cmt-g01_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.4CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
5.5
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.86%
Probability of exploitation in next 30 days
EPSS Percentile
54.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0086 is in the 65th percentile among its peer group of 26,234 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

dl.weintek.com / public/Document/TEC/TEC21001E_cMT_EasyWeb_V1_Security_Issues.pdf
MitigationVendor Advisory
cisa.gov / uscert/ics/advisories/icsa-21-082-01
Third Party AdvisoryUS Government Resource